Each skill gives two effects. The first effect increases with each level and the second effect increases every third level.

Upgrading a skill costs skill points, however for every unspent skill point you get +7 initial mana. More initial mana is needed to create gems strong enough to survive harder starting waves, so it is not always wise to spend all points on skills.

Upgrading a skill from nothing to level 1 costs 1 point, level 1 to level 2 costs 2 points, and so on. The total number of points required to go from a nothing to a given skill level is: (n² + n) / 2, where n is the skill level desired.

You can upgrade crafting, spell, and bomb skills up to 45 times plus extra levels gained from bonuses (talisman fragments and the +10 level for Wake of Eternity by beating Y6).

A maxed skill costs 1035 skill points, and for all skills maxed (other than uncapped skills), you need 12420 skill points. With no other skill points, this would require a Wizard Level of 1775.

Points are acquired by the following methods:

7 per Wizard Level

660 for all achievements

120 for resetting achievements after unlocking more than 180 of them (achievements gained previously have to be re-earned)

Skills written in Bold have no skill caps. All other skills are capped at 45, however, it is possible to have skill levels up to 60 on capped skills with talisman fragments. Wake of Eternity can have a skill cap of 70 with the right fragments after beating Field Y6.